Liquid crystal display and fabrication method thereof

Abstract

A liquid crystal display employs an on-common storage capacitor which includes a lower storage electrode of a predetermined size provided in the same layer that a signal line is formed, and a pixel electrode provided on the lower storage electrode, and functioning as an upper storage electrode. A method of fabricating the liquid crystal display is also provided.

1. A liquid crystal display comprising:
 a substrate; 
 a data line on the substrate; 
 a lower storage electrode of a storage capacitor of a pixel, the lower storage electrode being spaced apart from the data line and having a first portion extending parallel to the data line and a second portion extending perpendicular to the data line, said first portion and said second portion being a single piece structure of uniform thickness, said first portion being formed of the same material as said second portion; 
 a lower insulating layer on the substrate, the lower storage electrode and the data line being directly on an upper surface of the lower insulating layer; and 
 a pixel electrode provided over the lower storage electrode, and functioning as an upper storage electrode of the storage capacitor of the pixel. 
 
     
     
       2. The liquid crystal display of  claim 1 , wherein the lower storage electrode is formed of the same material as the data line. 
     
     
       3. The liquid crystal display of  claim 1 , wherein the first portion of the lower storage electrode is formed to cross the pixel electrode at a right angle. 
     
     
       4. The liquid crystal display of  claim 1 , wherein a longest portion of the lower storage electrode is in parallel with the data line. 
     
     
       5. The liquid crystal display of  claim 1 , wherein the lower storage electrode forms the storage capacitor with the pixel electrode in a vertical direction. 
     
     
       6. The liquid crystal display of  claim 1 , wherein the second portion comprises a predetermined size of a wing in parallel with a scanning line that is provided to cross the data line at a right angle. 
     
     
       7. The liquid crystal display of  claim 1 , wherein the lower insulating Layer is located between the lower storage electrode and the substrate. 
     
     
       8. The liquid crystal display of  claim 7 , further comprising at least one scanning line on the substrate, the lower insulating layer covering a top surface of the at least one scanning line. 
     
     
       9. A liquid crystal display comprising:
 a substrate; 
 a plurality of scanning lines formed on the substrate; 
 a plurality of data lines formed on the substrate to cross the plurality of scanning lines at a right angle; 
 a thin film transistor formed on the cross portion of one of said scanning lines and one of said data lines; 
 an on-common lower storage electrode of an on-common storage capacitor of a pixel, the lower storage electrode being spaced apart from the data line and being provided to cross the scanning lines at a right angle and be in parallel with the data lines, said lower storage electrode having a first portion extending parallel to the data lines and a second portion extending perpendicular to the data lines, said first portion and said second portion being a single piece structure of uniform thickness, said first portion being formed of the same material as said second portion; 
 a lower insulating layer on the substrate, the lower storage electrode and the data lines being directly on an upper surface of the lower insulating layer; and 
 a pixel electrode provided at a matrix region defined by the crossing of the scanning lines and the data lines, and functioning as an on-common upper storage electrode of the on-common storage capacitor of the pixel. 
 
     
     
       10. The liquid crystal display of  claim 9 , wherein the lower storage electrode is formed of the same material as the data line. 
     
     
       11. The liquid crystal display of  claim 9 , wherein the first portion of the lower storage electrode is formed to cross the pixel electrode at a right angle. 
     
     
       12. The liquid crystal display of  claim 9 , wherein a longest portion of the lower storage electrode is in parallel with one of said data lines. 
     
     
       13. The liquid crystal display of  claim 9 , wherein the lower storage electrode forms the on-common storage capacitor with the pixel electrode in a vertical direction. 
     
     
       14. The liquid crystal display of  claim 9 , wherein the second portion comprises a predetermined size of a wing in parallel with one of said scanning lines, which is provided to cross one of said data lines at a right angle. 
     
     
       15. The liquid crystal display of  claim 9 , wherein the insulating layer is located between the lower storage electrode and the substrate. 
     
     
       16. The liquid crystal display of  claim 15 , wherein the lower insulating layer covers a top surface of the plurality of scanning lines. 
     
     
       17. A liquid crystal display comprising:
 a substrate; 
 a data line on the substrate; 
 a lower storage electrode of a storage capacitor of a pixel, the lower storage electrode being spaced apart from the data line and having a first portion extending parallel to the data line and a second portion extending perpendicular to the data line, said first portion and said second portion being a single piece structure of uniform thickness, said first portion being formed of the same material as said second portion, the lower storage electrode being above a lower insulating layer; 
 the lower insulating layer on the substrate, the lower storage electrode and the data line being directly on an upper surface of the lower insulating layer; and 
 a pixel electrode provided over the lower storage electrode, and functioning as an upper storage electrode of the storage capacitor of the pixel. 
 
     
     
       18. The liquid crystal display of  claim 17 , wherein the insulating layer is located between the lower storage electrode and the substrate. 
     
     
       19. The liquid crystal display of  claim 18 , further comprising at least one scanning line on the substrate, the lower insulating layer covering a top surface of the at least one scanning line.